nhỏ từ từ dd HCl 2M vào 400ml dd hh X gồm NaOH 0,5M và NaAlO2 0,8M. sau mooyj thời gian thu đc 19,5 gam kết tủa . tính thể tích dd HCl tối thiểu cần dùng

Bài 4 . Một hợp chất có thành phần phân tử gồm hai nguyên tố S và O. Tỉ lệ khối lượng của S và O là 2: 3 . Công thức hóa học của hợp chất là gì?

Tìm số nguyên n để n + 2 chia hết cho n - 3 có giá trị là số nguyên. M.n giúp mk với cần gấp!!!

Đọc vb Cô bé bán diêm và cho bt cô bé đã quẹt diêm mấy lần. Nêu ý nghĩa của những lần quẹt diêm đó. P/s: tối nay mik nộp r nên mong mn giúp sớm ạ

.I (not see) …………………her since last week. 30. John( do) ………has done………..his homework already. 31 Hanh ……………………(not read) book at the moment. 32. Our teacher usually ……………………(give) us many exercises. 33. He often ……………………(catch) a train to work. 34. The cat ……………………(catch) mouse. 35. They ……………………(plant) trees overthere at the moment. 36. My old friend, Manh ……………………(write) to me twice a month. 37. What she says ……………………(be) true. 38. Where ………….. she ……………………(buy) her breakfast everymorning? 39. Jack (look) no trouble with my English lesson up to now. ....................................................... 30. I ( lose )..................my pen. I can’t find it everywhere. 31 .We ( see ) ...................................a road accident near the shopping center this morning. 32. Nam ( buy ).......................a new dictionary yesterday. 33. His hair is very short . He ( have )............a haircut. 34. Last night my father ( arrive )..........home late .He ( have )..................a bath and then (go)..... to bed. 35. My bicycle isn’t here anymore .Somebody (take) ...it. 36. When .....you( start )..........school ? - When I was six. 37. I (not / eat)......anything yesterday because I(not/ feel) ........................hungry. 38. The glasses look very clean . ...you ( wash ) ........them ? 39. Why.............. Long ( not / want ).................to play soccer last Sunday ? 40. I don’t know Hung ‘s sister . I ( never /meet ) .............1\ 41. I _________________________ (be) there at four o'clock, I promise. 42. A: “I’m cold.” B: “I _________________________ (turn) on the fire.” 43.A: “She's late.” B: “Don't worry she _________________________ (come).”

EM CẦN GẤP NHA MỌI NGƯỜI !!!! MỌI NGƯỜI GIÚP EM

Em hãy sắp xếp các từ sau thành câu hoàn chỉnh. 1. a / presents / of / get / Children’s / lot / on / Children / Day 2. like / rice / would / and / chicken / you / some/? ____________________________________________________ 3. mountains / explore / to / caves / I’m / the / in / going ______________________________________________________ 4. your / phone / number / brother’s / what’s/? ________________________________________________ 5. they / because / she / zebras / likes / beautiful / are ______________________________________________________ 6. mother/ in/ is/ My/ the/ kitchen./ cooking/ ___________________________________________ 7. What/ your/ look/ mother/ like?/ does/ ___________________________________________ 8. skinny/ is/ very/ and/ tall/ Linda/ ___________________________________________ 9. they/ do/ do/ Children’s/ on/ Day?/ What/ ___________________________________________ 10. Day/ Valentine/ today./ is/ It/ ___________________________________________ 11. Let’s/ to/ go/ bakery/ the/ ./ ___________________________________________ 12. buy/ I/ to/ some/ Because/ want/ medicine/ ./ ___________________________________________ 13. don’t/ go to/ you/ the museum?/ Why/ ___________________________________________ 14. do/ go to/ you/ Why/ the bank?/ want to/ ___________________________________________ 15. much/ How/ sandals?/ the/ are/ ___________________________________________ 16. is/ shop,/ the/ Where/ please?/ clothes/ ___________________________________________ 17. Tom?/ is/ your/ What/ number,/ phone/ ___________________________________________ 18. do/ their/ they/ What/ free/ time?/ do/ in/ ___________________________________________ 19. like/ to/ picnic/ have/ Would/ with/ us?/ you/ a/ ___________________________________________ 20. cooking/ for/ She/ family./ loves/ the/ ___________________________________________ 21. you/ do/ What/ do/ Tuesdays/ on/ ?/ ___________________________________________ 22. I/ sit/ on/ the/ Can/ chair/ ?/ ___________________________________________ 23. nice/ a/ picture/ What/ !/ ___________________________________________ 24. you/ have/ When/ do/ Science/ ?/ ___________________________________________ 25. The/ play/ in/ the/ boys/ often/ badminton/ playground/ ./ ___________________________________________ 26. I/ evening/ TV/ watched/ yesterday/./ ___________________________________________

Nl: Nhoms ai điểm ít ít mà đang tuyển thành viên ko gắt gao cho teo vào vs Vẽ mầm mệt mỏi thở phù , bằng app, 1 pic ký 1 píc ko. (Chỉ dành cho những người vẽ đẹp thôi nha, ông nào mà vẽ méo mó tui bc chớt, ko lấy tranh cũ )

C. BÀI TẬP VẬN DỤNG: ❶. PHONETICS I. Choose the words whose underlined part is pronounced differently from that of the others in each group 1. A. lantern B. invader C. nation D. race 2. A. carnival B. command C. ceremony D. encourage 3. A. tradition B. question C. procession D. preservation 4. A. performed B. worshipped C. prayed D. offered 5. A. sound B. crowd C. found D. court 6. A. end B. pencil C. open D. bench 7. A. wanted B. washed C. liked D. stopped 8. A. sound B. cloud C. found D. favourite 9. A. pictures B. watches C. buses D. brushes 10. A. rest B. different C. ethnic D. question 11. A. polluted B. established C. finished D. watched 12. A. crafts B. stops C. opens D. months 13. A. what B. where C. who D. when 14. A. wanted B. washed C. decided D. needed 15. A. although B. laugh C. paragraph D. enough 16. A. stroll B. oversea C. remove D. go 17. A. lucky B. structure C. push D. struggle 18. A. rebooked B. overcooked C. opened D. latched 19. A. southern B. south C. synthetic D. fourth 20. A. fang B. slang C. angry D. dangerous 21. A. when B. which C. whole D. what 22. A. environment B. comment C. development D. improvement 23. A. great B. fate C. seat D. hate 24. A. sugar B. since C. sight D. song 25. A. change B. chocolate C. chip D. schedule 26. A. ordered B. developed C. touched D. escaped 27. A. washes B. handles C. courses D. teaches 28. A. happiness B. homework C. honour D. hungry 29. A. dead B. leader C. feast D. heating 30. A. thorn B. thong C. there D. theatre II. Choose the word whose main stressed syllable is placed differently from that of the other in each group. 1. A. inhabit B. devotion C. character D. suggestion 2. A. assistant B. possible C. happiness D. holiday 3. A. vacancy B. beautiful C. delicious D. separate 4. A. entrance B. lesson C. dancer D. police 5. A. discover B. confidence C. relation D. employment 6. A. reply B. marriage C. response D. maintain 7. A. difficult B. biology C. decision D. obedient 8. A. understand B. identity C. recommend D. engineer 9. A. technology B. geology C. curriculum D. independence 10. A. technical B. different C. remember D. interview 11. A. flavour B. summer C. machine D. theatre 12. A. hobby B. enrol C. favour D. summer 13. A. centre B. village C. harvest D. appear 14. A. excellent B. efficient C. popular D. beautiful 15. A. finish B. revise C. provide D. prefer

Làm nhang cho e với đang cần lắm